Patent US2756342A successfully refreshed from Google Patents.
US2756342A
Expired / Lapsed
US
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Analyzer
Assignee: Phillips Petroleum Co
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Filing: 1953-02-25
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Granted: 1956-07-24
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Expires: 1973-02-25
Abstract
No abstract record available.
Inventors
- 👤 Elmer C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:25
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/3504
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
AN ANALYZER ADAPTED TO DETECT OLEFINS IN THE PRESENCE OF PARAFFINS HAVING FOUR CARBON ATOMS PER MOLECULE COMPRISING A SAMPLE CELL ADAPTED TO CONTAIN A GASEOUS SAMPLE OF MATERIAL UNDER ANALYSIS, A SOURCE OF INFRARED RADIATION, MEANS TO DIRECT TWO BEAMS OF RADIATION FROM SAID SOURCE THROUGH SAID SAMPLES CELL, A FIRST FILTER CELL CONTAINING A GASEOUS PARAFFIN HAVING FOUR CARBON ATOMS PER MOLECULE DISPOSED IN ONE OF SAID BEAMS, A SECOND FILTER CELL CONTAINING A GASEOUS OLEFIN DISPOSED IN THE OTHER OF SAID BEAMS, A SPINEL FILTER DISPOSED IN SAID OTHER BEAM, AND RADIATION DETECTING MEANS TO MEASURE THE RESULTING INTENSITIES OF SAID BEAMS WHEREBY CHANGES IN THE RESULTING INTENSITIES ARE INDICATIVE OF CHANGES IN CONCENTRATION OF OLEFINS PRESENT IN THE SAMPLE CELL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |